What Is Utilization Rate in Accounting? A Simple Guide

Your team looks busy all day. But how much of that time turns into billable work?

That is the question utilization rate answers. If you run an accounting firm, this number helps you spot lost revenue, plan hiring, and keep your team from burning out.

This guide explains what utilization rate in accounting means, how to calculate it, what a good rate looks like, and how to improve yours.

What Is Utilization Rate in Accounting?

Utilization rate is the share of a person's available work time that goes to billable client work. Accountants also call it the billable utilization rate.

Two types of hours matter here:

• Billable hours are hours you can charge a client for, such as bookkeeping, tax preparation, or advisory work.
• Non-billable hours are hours your firm needs but cannot charge for, such as internal meetings, training, admin tasks, and marketing.

Utilization rate compares the two. A higher rate means more of your team's time earns revenue. It is one of the most useful accounting KPIs for any firm that bills by the hour or wants to understand its capacity.

The Utilization Rate Formula

The formula is simple:

Utilization Rate = (Billable Hours ÷ Available Hours) × 100

You can calculate it for one person, one team, or your whole firm. Pick a period, such as a week or a month, and use the same period every time.

Utilization Rate Examples

Here are three examples, each for a 160-hour month:

Notice the firm owner's rate is much lower. That is normal. Owners spend time on sales, reviews, and managing the team, so their billable share is smaller.

What Counts as Available Hours?

This is where firms often disagree. There are two common ways to define available hours:

• Total working hours. Use every scheduled hour, such as 160 hours in a month.
• Net available hours. Take total hours and subtract paid time off and holidays.

Here is how the choice changes the result. Say a person works 160 scheduled hours, takes 16 hours off, and bills 108 hours.

• Using total hours: 108 ÷ 160 × 100 = 67.5%
• Using net hours: 108 ÷ 144 × 100 = 75%

Neither method is wrong. Pick one, write it down, and use it for everyone. Consistency matters more than the method.

Utilization vs Realization Rate

People often mix up these two metrics, but they measure different things.

• Utilization rate asks: how much of our time was billable?
• Realization rate asks: how much of that billable time did we actually bill?

Realization Rate = (Billed Hours ÷ Billable Hours) × 100

For example, your team logs 120 billable hours but bills only 108. Your realization rate is 90%. The other 12 hours were written off, discounted, or forgotten.

You need both numbers to see your real revenue. Here is a simple example:

• 160 available hours × 75% utilization = 120 billable hours
• 120 billable hours × 90% realization = 108 billed hours
• 108 billed hours × $100 per hour = $10,800

A firm can have strong utilization and still lose money at the billing step. To learn more, read our guide to realization rate in accounting.

What Is a Good Utilization Rate?

There is no single right answer. A good utilization rate depends on the person's role and your firm's goals.

• Staff who do mostly client work often aim for around 75%.
• Managers and owners usually run lower because they also review, sell, and lead.

Do not chase 100%. A team at full utilization has no time for training, quality review, or rest. That can lead to errors and burnout. A healthy rate leaves room for the non-billable work that keeps your firm strong. For help planning the right balance, see capacity planning for accounting firms.

Why Utilization Rate Drops

If your rate is lower than you want, look for these common causes:

• Admin work. Chasing documents and rebuilding task lists eat billable time. Our post on why accounting firms lose time on admin work covers this in detail.
• Untracked time. If your team does not log hours, you cannot see where time goes.
• Scope creep. Unpaid extra work turns billable time into non-billable time.

How to Improve Your Utilization Rate

Small changes add up quickly. Try these steps:

1. Track time daily. Log hours against client tasks as you work, not at the end of the week.
   
   
2. Label time clearly. Mark every entry as billable or non-billable so your numbers stay clean.
   
   
3. Cut admin work. Use a client portal and automatic reminders instead of manual follow-ups.
   
   
4. Standardize your workflows. Reusable task templates save setup time on every engagement.
   
   
5. Review monthly. Look at utilization by person and by client, and use the numbers to adjust workloads, not to blame people.

Good time tracking is the foundation. See how time tracking helps accountants maximize billable hours for practical tips.

How Basil Helps You Track and Improve Utilization

You cannot improve a number you cannot see. Basil is refreshingly simple accounting practice management software built for CPAs, bookkeepers, and small accounting firms. It gives you the tools to measure and improve utilization in one place.

• Time tracking. Your team logs hours against client tasks and marks each entry as billable or non-billable.
  
  
• Billing from tracked time. Turn completed work into invoices without retyping hours.
  
  
• Dashboards. See billable hours, staff performance, and project status in one view.
  
  
• Workflow templates and client portal. Apply a checklist to any client in one click, and collect documents in one secure place instead of chasing them over email.

Pricing starts at $15 per month, and you can try it with a 15-day free trial. No credit card is required. You can explore Basil to see how it fits your firm.

Conclusion

Utilization rate shows how much of your team's time turns into billable work. Calculate it by dividing billable hours by available hours, then multiplying by 100.

Remember three things. Define available hours once and use that definition every time. Read utilization alongside realization rate, because both affect your revenue. And aim for a healthy rate, not a perfect one.

Start by tracking time for one month. The numbers will show you where your hours go, and where you can win them back.